7 Auto Indexing,Clusters and Typedefs

8/3/2019 7 Auto Indexing,Clusters and Typedefs

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Auto-indexing

Auto-indexing

Tunnel


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Auto-indexing

Wire an array to or from a loop, the tunnel can be

changed to enable auto-indexing

To pop the elements of array one by one out of theinput terminal or push the elements one by one into

the output terminal.


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Auto-indexing Input

Control the number of iterations of a for-loop with Auto-

indexing(Number of iteration=array size)

Take the smallest number of elements if there is more than one array

Number of iterations of While loop is not affected by the number of

elements in the array eventhough auto-indexing is enabled.


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Auto-Indexing

Default for For Loop when we are connecting an

array to the For Loop will be an auto-indexed

tunnel. Default for While Loop when we are connecting

an array to the While Loop will be a normal

tunnel.


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Auto-indexing Output

Auto-indexed output arrays size = Number of iterations


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Exercise

Creating An array of 8 Random Integers from 1to 10 Use auto-indexing to iterate a For Loop for 8 times.(Hint: random number VI located in Numeric Functions palette)

Generates a random double precision floating point number0, and


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Demonstration

Auto-indexing.vi


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Arrays Creating & Initializing 2D Arrays


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Clusters

Group mixed type data elements

Similar to a record/struct in text-based programming


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B. Clusters Cluster Creation & Constants

Similar to Array

Use Cluster VIs

DEMONSTRATION


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B. Clusters Order

Cluster elements have a logical

order unrelated to their position

in the shell

View and modify the cluster

order:

Right-clicking the cluster border

selecting Reorder Controls

In Cluster


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B. Clusters Assembling a Cluster

Use the Bundle function from cluster functions

palette to assemble a new cluster

DEMONSTRATION


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B. Clusters Disassembling a Cluster

Use the Unbundle By Name or Unbundle function

to use individual items in a cluster


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B. Clusters Modifying a Cluster

Use the Bundle By Name or the Bundle function to

modify an existing cluster


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Demonstration

Learn how to use Bundle/Unbundle/Unbundle By

Name


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Clusters Error Clusters

LabVIEW uses error clusters to pass errorinformation

An error cluster contains the following elements:

status: Boolean value that reports True if an error occurs

code: 32-bit signed integer that identifies the error

source: String that identifies where the error occurred


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Extras:

Disable automatic error handling by go to

(Tools-Option-Block Diagram-Error Handling) to

uncheck the automatic error handling.


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Demonstration

Cluster.vi


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C. Custom Control

Customize the control/indicator by adding picture into

it and etc

Use the Control Editor window to customize controlsand indicators:

Right-click a control/indicator

AdvancedCustomize


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C. Custom Control-Types

Control:

If edit, its instances not affected

Type Definition:

If edit, it will update all its instances

(only data type changes are updated)

Strict Type Definition

If edit, it will update all its instances

(all changes are updated except label, description &

default value)


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Demonstration

Custom Control.vi


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Quiz

What is the result of the following Array

subtraction?

a. A 1-D array of {-25,25,50}

b. A 1-D array of {-25,25}


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Quiz

What is the output value of the result?

a. 1-D array of {2,3,4,5}

b. 1-D array of {2}


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Links

Join the NI Community:

http://decibel.ni.com/content/index.jspa

Then join groups:

http://decibel.ni.com/content/groups/loop

http://decibel.ni.com/content/groups/mmu-labview

http://decibel.ni.com/content/groups/labview-career-network
http://decibel.ni.com/content/index.jspahttp://decibel.ni.com/content/groups/loophttp://decibel.ni.com/content/groups/mmu-labviewhttp://decibel.ni.com/content/groups/labview-career-networkhttp://decibel.ni.com/content/groups/labview-career-networkhttp://decibel.ni.com/content/groups/labview-career-networkhttp://decibel.ni.com/content/groups/labview-career-networkhttp://decibel.ni.com/content/groups/labview-career-networkhttp://decibel.ni.com/content/groups/labview-career-networkhttp://decibel.ni.com/content/groups/labview-career-networkhttp://decibel.ni.com/content/groups/mmu-labviewhttp://decibel.ni.com/content/groups/mmu-labviewhttp://decibel.ni.com/content/groups/mmu-labviewhttp://decibel.ni.com/content/groups/loophttp://decibel.ni.com/content/index.jspa


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LabVIEW Student Design Competition:

http://www.ni.com/studentdesign

Win cash prizes

Win a trip to Austin, US to attend NIWeek
http://www.ni.com/studentdesignhttp://www.ni.com/studentdesign


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Links(Facebook)

http://www.facebook.com/labviewu?sk=wall

http://www.facebook.com/NIWeek
http://www.facebook.com/labviewu?sk=wallhttp://www.facebook.com/NIWeekhttp://www.facebook.com/NIWeekhttp://www.facebook.com/labviewu?sk=wall


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Contact

Tan Han Hui

LabVIEW Student Ambassador

MMU, Cyberjaya

+6012-4796866

[email protected]
mailto:[email protected]:[email protected]

7 Auto Indexing,Clusters and Typedefs

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